[1] [1] TASPINAR N, ALHALABI M. Performance investigation of long-haul high data rate optical OFDM IM/DD system with different QAM modulations[J]. Journal of electrical engineering, 2021, 72(3):192-197.

[2] [2] PUZA R, SUSMITA G, SEJUTI Z, et al. Symmetric wavelength reused bidirectional RSOA based WDM-PON with NRZ data in downstream and upstream[C]//2021 International Conference on Automation, Control and Mechatronics for Industry 4.0 (ACMI), July 8-9, 2021, Rajshahi, Bangladesh. New York:IEEE, 2021:978.

[3] [3] EL-NAHAL F, HANIK N. Technologies for future wavelength division multiplexing passive optical networks[J]. IET optoelectronics, 2020, 14(2):53-57.

[4] [4] MEHDI H A, ABBAS A S. PAPR reduction in OFDM systems:an efficient PTS approach based on particle swarm optimization[J]. ICT express, 2019, 5:178-181.

[5] [5] FENG N, LI Y. A novel adaptive QAM coder/decoder for bit and power loading in IM/DD OFDM-PON transmission system[J]. Optik, 2021, 238:166766.

[6] [6] SHAO Y F, LONG Y, WANG A R, et al. Research on optical 32QAM-OFDM-PON access scheme with different numbers of sub-carriers using DMT modulation[J]. Journal of the European optical society-rapid publications, 2020, 16(10).

[7] [7] KOUSIK M, KAJAL M, ASHIF R, et al. All-optical soliton based universal logic NOR utilizing a single reflective semiconductor optical amplifier (RSOA)[J]. Photonic network communications, 2022, 43:101-108.

[8] [8] TARAPRASAD C, PARTHA P P, MEENAKSHI C. Post-detection modulating signal power reduction due to optical feedback[J]. Applied physics B, 2020, 126:139.

[9] [9] FENG N, LIAN B, SUN X. Applying hierarchical modulation and network coding in IM/DD OFDM-PON[J]. Optical and quantum electronics, 2021, 53:540.

[10] [10] SAMIR M H, SINAN M A, ATHEER A S. Performance enhancement for visible light communication based ADO-OFDM[J]. Optical and quantum electronics, 2021, 53:339.

[11] [11] RIZWANA A, ANAND S. Optical GFDM:an improved alternative candidate for indoor visible light communication[J]. Photonic network communications, 2020, 39:152-163.

[12] [12] WANG Z P, CHEN S F. BER performance analysis of an OFDM-based visible light communication system using DHT post-coding[J]. Optoelectronics letters, 2022,18(5):288-292.

[13] [13] MEET K, ANU S, REECHA S. Performance analysis of symmetrical and bidirectional 40 Gbps TWDM-PON employing m-QAM-OFDM modulation with multi-color LDs based VLC system[J]. Optical and quantum electronics, 2021, 53:455.

[14] [14] ESZTER U. Performance optimization of RSOA based mm-wave radio-over-fibre access network[J]. Optical and quantum electronics, 2021, 53:578.

[15] [15] MANDAL G, MUKHERJEE R, DAS B, et al. Next-generation bidirectional triple-play services using RSOA based WDM radio on free-space optics PON[J]. Optics communications, 2018, 411:138-142.

[16] [16] SPERM M, BABIC D. Wavelength reuse WDM-PON using RSOA and modulation averaging[J]. Optics communications, 2019, 451:1-5.

[17] [17] DAHAWI T, YUSOFF Z, SALLEH M. Low-cost MIMO-RoF-PON architecture for next-generation integrated wired and wireless access networks[J]. Journal of optical communications and networking, 2021,13(3):41-52.

[18] [18] ZHANG Z, LUO Y, ZHANG C. Constellation shaping chaotic encryption scheme with controllable statistical distribution for OFDM-PON[J]. Journal of lightwave technology, 2022, 40(1):14-23.

[19] [19] YEHA C H, CHOWB C W, LINC W P. Utilizing single-wavelength for OFDM wireless downstream and remodulated OOK upstream in colorless access network to mitigate Rayleigh backscattering noise[J]. Optical fiber technology, 2020, 58:102268.